fix image tags

.github/workflows/build-docker.yml

@@ -50,7 +50,7 @@ jobs:
           images: ${{ secrets.DOCKER_HUB_ORGANISATION }}/pixelfed
           flavor: |
             latest=auto
-            suffix=apache
+            suffix=-apache
           tags: |
             type=edge,branch=dev
             type=pep440,pattern={{raw}}
@@ -101,8 +101,7 @@ jobs:
         with:
           images: ${{ secrets.DOCKER_HUB_ORGANISATION }}/pixelfed
           flavor: |
-            latest=auto
-            suffix=fpm
+            suffix=-fpm
           tags: |
             type=edge,branch=dev
             type=pep440,pattern={{raw}}